| Autor: |
Campargue, Christian, Lafitte, Claude, Esquerré-Tugayé, Marie-Thérèse, Mazau, Dominique |
| Zdroj: |
Analytical Biochemistry; March 1998, Vol. 257 Issue: 1 p20-25, 6p |
| Abstrakt: |
The plant cell wall hydroxyproline-rich glycoprotein (HRGP), also called extensin, contains arabinose and oligoarabinoside side chains O-glycosidically linked to hydroxyproline (Hyp). We present a highly sensitive method for determining both the glycosylation pattern and the Hyp content of HRGP requiring only nanomole amounts of each Hyp-compound for accurate determination. This method is based on anion-exchange chromatography followed by pulsed amperometric detection of the Hyp-oligoarabinosides and Hyp released from HRGP by 0.22 M Ba(OH)2hydrolysis, which cleaves only peptidyl bonds. A sodium acetate gradient (0–250 mM) in 150 mM NaOH elutes Hyp and the Hyp-oligoarabinosides Hyp-(Ara)1–5in less than 40 min. We have used this procedure to determine the glycosylation pattern of Hyp in plant cell walls, without prior isolation of HRGP. |
| Databáze: |
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| Externí odkaz: |
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